الفهرس 
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Abstract
The present research was preformed to study the influence of nitrogen fertilization each alone or phosphorus and potassium on yield, berries quality of the Thompson Seedless grapevines.
This study was carried out during the seasons of 2000 and 2001 on 10-year-old vines grown in a clay loam soil at a private vine yard located at Wakf village near El-Mansoura City, Dakahlia Governorate.